Introduction to global short message communication service of BeiDou-3 navigation satellite system

Li, Gang; Guo, Shuren; Lv, Jing; Zhao, Kanglian; He, Zehua

doi:10.1016/j.asr.2020.12.011

Cited by 29 publications

(10 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…GSMC(Global Short Message Communication) is one of the newly BDS-3(The third phase of the BeiDou system) featured services and is mainly based on the Medium Earth Orbit (MEO) satellites [8], [9]. It has been studied to transmit information worldwide in many fields [10]- [15].…”

Section: Introductionmentioning

confidence: 99%

Integrated Navigation and Communication Service for LEO Satellites Based on BDS-3 Global Short Message Communication

Guo

Zheng

et al. 2023

IEEE Access

Self Cite

View full text Add to dashboard Cite

Massive global Low Earth Orbit (LEO) constellations have been developed rapidly with the characteristics of higher number and shorter orbital periods of LEO satellites in recent years. The increasing requirements of real-time orbit determination and emergency data transfer in full arc can hardly meet by traditional regional ground stations. An integrated communication and navigation service architecture based on the third phase of the BeiDou system(BDS-3) Global Short Message Communication (GSMC) is proposed, which enables global coverage and random access. The GSMC downlink single-frequency signal is used for real-time orbit determination, and is further combined with B1C navigation signal for real-time dual-frequency high-precision orbit determination. Considering fast moving of LEO satellites and short burst of uplink messages, the uplink BDS-3 satellite selection strategy based on carrier-to-noise ratio, and uplink high-precision compensation of frequency shift are adopted to increase the communication success rate. The service architecture proposed can improve the precision of the autonomous orbit determination and enhance the capability of real-time command transmission of LEO satellites even without the traditional ground stations involved. According to the simulated analysis and first on-board test data, the integrated communication and navigation service has been validated. The precision of single-frequency real-time orbit determination can reach 2.83m, and the precision of dual-frequency can reach 0.26m. The average time delay of communication is about 11.45s, and the success rate is about 99.8%. The method may provide alternative means of real-time high-precision orbit determination and emergency data transfer of LEO satellites.

show abstract

Section: Introductionmentioning

confidence: 99%

Integrated Navigation and Communication Service for LEO Satellites Based on BDS-3 Global Short Message Communication

Guo

Zheng

et al. 2023

IEEE Access

Self Cite

View full text Add to dashboard Cite

show abstract

“…2. To allow rapid follow-up observations with GECAM triggers, the GECAM alert data are downlinked in real time by the global short message communication service (Li et al 2021b) of the Beidou navigation satellite system (Yang et al 2019). With the alert data, an automatic onground analysis pipeline is used to provide a refined localization result, which is based on the χ 2 minimization localization method.…”

Section: Introductionmentioning

confidence: 99%

GECAM Localization of High-energy Transients and the Systematic Error

Zhao

Xue

Xiong³

et al. 2023

ApJS

View full text Add to dashboard Cite

The Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a pair of microsatellites (i.e., GECAM-A and GECAM-B) dedicated to monitoring gamma-ray transients including the high-energy electromagnetic counterparts of gravitational waves, such as gamma-ray bursts, soft gamma-ray repeaters, solar flares, and terrestrial gamma-ray flashes. Since launch in 2020 December, GECAM-B has detected hundreds of astronomical and terrestrial events. For these bursts, localization is the key for burst identification and classification as well as follow-up observations in multiple wavelengths. Here, we propose a Bayesian localization method with Poisson data with Gaussian background profile likelihood to localize GECAM bursts based on the distribution of burst counts in detectors with different orientations. We demonstrate that this method can work well for all kinds of bursts, especially extremely short ones. In addition, we propose a new method to estimate the systematic error of localization based on a confidence level test, which can overcome some problems of the existing method in the literature. We validate this method by Monte Carlo simulations, and then apply it to a burst sample with accurate location and find that the mean value of the systematic error of GECAM-B localization is ∼2.°5. By considering this systematic error, we can obtain a reliable localization probability map for GECAM bursts. Our methods can be applied to other gamma-ray monitors.

show abstract

“…The Global Navigation Satellite System (GNSS) has been widely used in geosciences and life [1,2]. In particular, China's BeiDou Global Navigation Satellite System (BDS-3) was officially operated for global users on July 31, 2020 [3]. As the first hybrid constellation of navigation satellite systems in the world, BDS-3 has been developing rapidly and providing global services, and can provide positioning, navigation, and timing (PNT) services [4].…”

Section: Introductionmentioning

confidence: 99%

Variation Characteristics of Multi-Channel Differential Code Biases from New BDS-3 Signal Observations

Shi

Jin

2022

Remote Sensing

View full text Add to dashboard Cite

A multi-frequency Global Navigation Satellite System (GNSS) provides greater opportunities for positioning and navigation applications, particularly the BeiDou Global Navigation Satellite System (BDS-3) satellites. However, multi-frequency signals import more pseudorange channels, which introduce more multi-channel Differential Code Biases (DCBs). The satellite and receiver DCBs from the new BDS-3 signals are not clear. In this study, 9 DCB types of the new BDS-3 signals from 30-days Multi-GNSS Experiment (MGEX) observations are estimated and investigated. Compared with the DCB values provided by the Chinese Academy of Science (CAS) products, the mean bias and root mean squares (RMS) error of new BDS-3 satellite DCBs are within ±0.20 and 0.30 ns, respectively. The satellite DCBs are mostly within ±0.40 ns with respect to the product of the Deutsches Zentrum für Luft- und Raumfahrt (DLR). The four sets of constructed closure errors and their mean values are within ±0.30 ns and ±0.15 ns, respectively. The mean standard deviation (STD) of the estimated satellite DCBs is less than 0.10 ns. In particular, our estimated satellite DCBs are more stable than DCB products provided by CAS and DLR. Unlike satellite DCBs, the receiver DCBs have poor compliance and show an obvious relationship with the geographic latitude when compared to the CAS products. The STDs of our estimated receiver DCBs are less than 1.00 ns. According to different types of receiver DCBs, the distribution of STDs indicates that the coefficient of the ionospheric correction has an influence on the stability of the receiver DCBs under the ionosphere with the same accuracy level. In addition, the type of receiver shows no regular effects on the stability of receiver DCBs.

show abstract

Introduction to global short message communication service of BeiDou-3 navigation satellite system

Cited by 29 publications

References 18 publications

Integrated Navigation and Communication Service for LEO Satellites Based on BDS-3 Global Short Message Communication

Integrated Navigation and Communication Service for LEO Satellites Based on BDS-3 Global Short Message Communication

GECAM Localization of High-energy Transients and the Systematic Error

Variation Characteristics of Multi-Channel Differential Code Biases from New BDS-3 Signal Observations

Contact Info

Product

Resources

About